salonikios
Newbie level 2
Hi guys,
I have the following assignment and i will be very grateful if you give me some help-how to start thinking to find out the solution,any relevant literature. Firstly, i read the ITU P.529 recommendation.
A mobile communication system operates at f=900MHz. The base station antenna is situated is situated at the top of the hill 300m high and radiates 10kW erp (half-wave dipole reference) omnidirectionally. The hand-held mobile receiver has a block diagram as shown in the attached image. The antenna sees a noise temperature of 100K and is matched to the receiver whose input impedance is 50Ω. You are asked to evaluate the performance of this communication system, i.e to plot the SNR at the receiver as a function of distance from the transmitter, if the system operates in a sub-urban environment. Assume no polarisation mismatch.
Receiver characteristics
LNA: Noise Figure 4dB, Gain 20dB
Antenna: "Whip" type, 20 cm long, matching and other losses to LNA 0.5dB
Mixer: Conversion loss 5dB, noise figure 5dB
IF filter: 2MHz bandwidth, Gain 15dB, Noise Figure 7dB
I have the following assignment and i will be very grateful if you give me some help-how to start thinking to find out the solution,any relevant literature. Firstly, i read the ITU P.529 recommendation.
A mobile communication system operates at f=900MHz. The base station antenna is situated is situated at the top of the hill 300m high and radiates 10kW erp (half-wave dipole reference) omnidirectionally. The hand-held mobile receiver has a block diagram as shown in the attached image. The antenna sees a noise temperature of 100K and is matched to the receiver whose input impedance is 50Ω. You are asked to evaluate the performance of this communication system, i.e to plot the SNR at the receiver as a function of distance from the transmitter, if the system operates in a sub-urban environment. Assume no polarisation mismatch.
Receiver characteristics
LNA: Noise Figure 4dB, Gain 20dB
Antenna: "Whip" type, 20 cm long, matching and other losses to LNA 0.5dB
Mixer: Conversion loss 5dB, noise figure 5dB
IF filter: 2MHz bandwidth, Gain 15dB, Noise Figure 7dB
